termux nmap --iflist empty

[mishaparem]

Hello all!

I am trying to connect to my home computer. I've set up openvpn, seems like the connection is working fine, but I can't nmap my network from termux (to find my computer ip address). I can see the vpn tunnel:
ifconfg:
tun0: x.x.x.x 255.255.255.252

but when I run nmap -A x.x.x.x/30 -e tun0 I get:
I cannot figure out what source address to use for device tun0, does it even exist?

I tried nmap --iflist, but it's empty:
INTERFACES: NONE FOUND(!)
ROUTES: NONE FOUND(!)

same with nmap --iflist --unprivileged

Any help, ideas?

[ar664]

Termux can't bind to specific interfaces due to permissions. You can also see this when you try to ping through one

~ $ ping -I eth0 1.1.1.1
ping: SO_BINDTODEVICE: Operation not permitted

[sylirre]

Right, but there probably more issues. Latest Android versions (since 10?) do not allow accessing /proc/net, so accessing network info will require root permissions.